| Powell & Co | - | Guardloo | Ford | GM ● 33 | Gascoyne-Minilya Road Board | 1924-25 |
| Powell & Co | - | Guardoo | Ford | GM ● 33 | Gascoyne-Minilya Road Board | 1925-26 |
| Powell & Co | - | Guardoo | Ford | GM ● 33 | Goscoyne-Mililya Road Board | 1926-27 |
| Powell & Co | - | Guardoo | Ford | GM ● 33 | Gascoyne Minilya Road Board | 1927-28 |
| Powell and Co | - | Guardoo | Ford | GM ● 33 | Gascoyne-Minilya Road Board | 1923-24 |
| Power | D. J. | Koolberrin | Chrysler | NB ● 162 | Narembeen Road Board | 1927-28 |
| Power | G. | Meekatharra | Overland | MK ● 35 | Meekatharra Road Board | 1927-28 |
| Power | G. A. | 83 Northwood Street | Triumph 3½ H.P. Motorcycle | P 934 | Perth Municipality | 1919 |
| Power | J. | Bunbury | Chevrolet | BY 171 | Bunbury Municipality | 1927-28 |
| Power | K. | Bunbury | Ford | BY 83 | Bunbury Municipality | 1925-26 |
| Power | K. | Bunbury | Ford | BY 83 | Bunbury Municipality | 1926-27 |
| Power | Mrs D. | 89 High Street, Fremantle | Essex | 10302 | Metro Hire or Trade | 1926-27 |
| Power | P. | 31 Midgley Street, Victoria Park | Chevrolet | 6788 | Metro Private Car | 1925-26 |
| Power | W. J. | 129 South Terrace, Fremantle | Chevrolet | 5023 | Metro Private Car | 1924-25 |
| Power | W. J. | 129 South Terrace, Frremantle | Chevrolet | 5023 | Metro Private Car | 1925-26 |
| Power | Wm. | 129 South Terrace Fremantle | Essex | 12389 | Metro Private Car | 1927-28 |
| Power Bros | - | Moora | Chevrolet | M ● 140 | Moora Road Board | 1927-28 |
| Powers Bros | - | - | Essex | M ● 132 | Moora Road Board | 1925-26 |
| Powers Bros | - | Moora | Chevrolet | M ● 140 | Moora Road Board | 1926-27 |
| Poynton | J. | Midland Railway Co | Dodge | 9897 | Metro Private Car | 1926-27 |
| Poynton | J. | Midland Railway Co | Dodge | 9897 | Metro Private Car | 1927-28 |
| Poyser | J. | Bally Bally | Overland 25 H.P. | BE ● 56 | Beverley Road Board | 1917-18 |
| Poyser | J. | Bally Bally | Ford 20 H.P. | BE ● 56 | Beverley Road Board | 1919 |
| Poyser | W. | Ball-Bally | Overland 20 H.P. | BE ● 56 | Beverley Road Board | 1922-23 |
| Poyser | W. | Bally Bally, Beverley | Overland 20 H.P. | BE ● 56 | Beverley Road Board | 1923-24 |
| Poyser | W. H. A. | Bally Bally | Overland | BE ● 56 | Beverley Road Board | 1924-25 |
| Poyser | W. H. A. | Bally Bally | Overland | BE ● 56 | Beverley Road Board | 1925-26 |
| Poyser | W. H. A. | Bally Bally | Overland | BE ● 56 | Beverley Road Board | 1926-27 |
| Poyser | W. J. D. | Beverley | Fiat | BE ● 309 | Beverley Road Board | 1927-28 |
| Poyser Bros | - | - | Fiat Truck | BE ● 23 | Beverley Road Board | 1927-28 |
| Pozzi | J. | Gwalia | Overland 25 H.P. | ML ● 36 | Leonora-Malcolm Road Board | 1917-18 |
| Pozzi | J. | Gwalia | Overland 20 H.P. | ML 36 | Leonora-Malcolm Road Board | 1919 |
| Pozzi | J. | Leonora | Overland | LM ● 34 | Leonora-Malcolm Road Board | 1922-23 |
| Pozzi | J. | Mount George Hotel, Leonora | Overland | LM ● 34 | Leonora-Malcolm Road Board | 1923-24 |
| Pozzi | J. | Mount George Hotel, Leonora | Overland | LM ● 34 | Leonora-Malcolm Road Board | 1924-25 |
| Pozzi | J. | Mount George Hotel | Overland | LM ● 34 | Leonora-Malcolm Road Board | 1925-26 |
| Pozzi | J. | Mount George Hotel | Overland | LM ● 34 | Leonora-Malcolm Road Board | 1926-27 |
| Praed | John | 92 Palmerston Street, Perth | Essex | 1033 | Metro Private Car | 1923-24 |
| Praed | John | 92 Palmerston Street, Perth | Essex | 1033 | Metro Private Car | 1924-25 |
| Praed | John | 92 Palmerston Street, Perth | Essex | 1033 | Metro Private Car | 1925-26 |
| Praed | John | 92 Palmerston Street, Fremantle | Essex | 1033 | Metro Private Car | 1926-27 |
| Praed | John | 92 Palmerston Street, Perth | Essex | 1033 | Metro Private Car | 1927-28 |
| Prain | F. | 25 Sherwood Street, Maylands | Ford | 1257 | Metro Private Car | 1922-23 |
| Prain | Frank | 2 Sherwood Street, Maylands | Ford | 1257 | Metro Private Car | 1923-24 |
| Prain | Frank | 23 Sherwood Street, Maylands | Ford | 1257 | Metro Private Car | 1924-25 |
| Prain | Frank | 23 Sherwood Street, Maylands | Ford | 1257 | Metro Private Car | 1925-26 |
| Prain | Frank | 23 Sherwood Street, Maylands | Ford | 1257 | Metro Private Car | 1926-27 |
| Prain | Frank | 23 Sherwood Street, Maylands | Ford | 1257 | Metro Private Car | 1927-28 |
| Prater | A. J. | Darlington | Overland | 997 | Metro Private Car | 1926-27 |
| Prater | C. H. | 20 Hamilton Street, Boulder | Reo Truck | B 97 | Boulder Municipality | 1927-28 |
